Ore-crusher



(No Model.) 2 She etsSheet l.

8.3. KROM. ORB ORUSHBR.

atented Jan. 14; 1890.

( Modeli) 2 Sheets-Sheet 2.

S.R.KROM. ORE GRUSHER. No. 419,459. Patented Jan. 14, 1890.

N. PETERS. PMko-l-flhugrzplmr, Wathinglnn. D. C.

1 NITED STATES ATENT OFFICE. it

ORE-CRUSHER.

SPECIFICATION forming part of Letters Patent No. 419,459, dated January14, 1890.

Application filed May 3, 1888. Serial No. 272,658. (No model.) I

To all'whom it may concern.-

Be it known that I, STEPHEN R. KRoM, a citizen of the United States,residing at Plainfield, in the county of Union and State of New Jersey,have invented certain new and useful Improvements in Ore-Crushers, ofwhich the following is a specification, reference being had to thedrawings accompanying and forming a part ofthe same.

In United States patents granted to me and numbered 339,664, April 13,1886, and 340,720, April 27, 1886, and more particularly in the latter,I have shown and described machines for crushing ores having thefollowing general characteristics. Upon a suitable bed or base aremounted two sets of pillowblocks, one set being movable with respect tothe other. In these pillow-blocks are mounted the shafts of the twocrushing-rolls. The bolts passing through the stationary pillow-blocksare provided with suitable nuts and combined with adjustable spiralsprings, and connect with the movable or pivoted pillowblocks with thecapability of adjusting and limiting the movement or play of the rollcarried thereby with respect to the roll mounted in stationary bearings.For the purpose of inclosing the crushing-rolls a housing, partly ofiron and partly of wood, is built up around the rolls and secured to thebed-plate, and a hopper is provided for conveying to the rolls the oreto be crushed.

The machine which forms the subject of tuting the bed or frame was castin separate parts, bolted together, while in my present machine I castthe stationary pillow-blocks, the bearings for the pivotedpillow-blocks, and a portion of the iron housing all in one piece withthe bed-plate, and bolt to this solid casting the remaining metallicportions of the housing. .This construction secures special advantagesin this class of machines, for

it does away to a large extent with the bolts and nuts used to connectthe various parts, which, in a machine like this, subjected totremendous jars and strains, are very liable to loosen and wearunevenly. It gives the machine greater rigidity and stability andcheapens the cost of its construction.

Secondly. In my previous machines the tiebolts for adjusting the movableroll were provided near their middle with collars andpassed throughcylinders in the stationary pillowblocks, against the end of whichcylinders the collars abutted. The ends of the tie-bolts carriedadjusting-nuts, and between abut- 'ments on the stationary pillow-blocksand the nuts on the ends of the bolts extending through the same werearranged a series of stout springs. By means of the said nuts thetension of the springs was increased or diminished as circumstancesrequired, but as an adjustment of the rolls and springs was frequentlyrequired'and could only be obtained by the application of a powersufficient to overcome the tension of all the springs, their use wasattended with much difficulty and trouble. In lieu of this arrangement 1now connect the ends of the tie-bolts to the movable pillow-blocks,whether sliding .or swinging, and use with the tie-bolts'adj ustablecollars, by means of which the relative position of the rolls isdetermined. I also pass over the ends of the tie-bolts that extendthrough the stationary pillow-blocks cushions composed of two headsconnected by a number of bolts which are surrounded by spiral springs.These cushions are held in place by nuts on the ends of the maintiebolts.

These featureswill-be described more'in detail by reference to thedrawings, in which Figure 1'is a view of my improved crusher in sideelevation, the housing being in section. Fig. 2 is an end view with aportion of the housing removed. Fig. 3 is a top plan View of the frame.Fig. 4 is a side elevation of the same. Fig. 5 is an end View of thetension device or spring cushion. Fig. 6 is a sectional View of thesame, showing the manner of its application to the tie-bolts.

A is the bed plate or base of the frame of the machine. The stationarypillow-blocks C C and the side plates of the housing D are cast in onepiece with said bed-plate, as indi' cated in Fig. i. This produces acompact and strong structure, which adds mz'iterially to the value ofthe machine. The bearings a for the swinging pillow-blocks and a for theshaft of one of the crushing-rolls are centered-and cut in the solidcasting.

F is one of the swinging pillow-blocks, and G the roll mounted therein.II is the other roll mounted on the stationary pillow-blocks C C, andwhich driven by the large driving-wheel It. The smaller wheel I is seenred to the shaft of the roll G to keep up the move mentof the said rollin order to insure the proper crushing action of the machine when quartzor ore is fed to the rolls.

B is a metal housing, which is secured to the main frame and inclosesthe roll G on the swinging or pivoted pillow-blocks. E is also an ironhousing secured to the main frame.

K K is a cover or housing, preferably composed of wood,which is placedupon the iron housings already described.

M is the hopper secured by bolts to the side plates of the iron housing.It contains two inclined chutes L L, which deliver the quartz or othermaterial to the crushing-rolls.

N N are the tie'bolts. They are pivoted at one end to the swingingpillow-blocks and their other ends extend through that portion of thecasting forming the stationary pillowblocks.

0 O are two heads or plates with central perforations, through whichpass the tie-bolts, and with a number of perforations near theirperipheries, through which pass small bolts P P. Spiral springs Rsurround the bolts P, and their degree of compression is regulated bynuts 1), that screw on their ends. I also surround the main tie-bolts Nwith a spiral spring between the two heads 0 and O, as shown in Fig. 6,and I prefer to make this spring somewhat stouter than the others, sothat it is capable of withstanding a greater strain. One of thesecushions is fitted over the projecting end of each tie-bolt N, togetherwith nut T, and their purpose and the mode of adjusting them are asfollows:

To adapt the machine for use, the springs R are compressed to thedesired extent by turning up the nuts 1) on bolts P P and bringing upthe pivoted pillow-bloeks by advancing the nut T until the rolls aresecured at the desired distance apart. The nuts V, which I sometimes useon the tie-bolts, are then adjusted so that they abut against thestationary pillow-blochs (J. Under these conditions a practically rigidconnection between the two sets of pillow-blocks is maintained. Shouldalump of ore or some foreign sub stance find its way between the rollsthat the usual pressure is not sufficient to crush, the

springs is adjusted so that only an extraordinary strain upon them willcause their further perceptible compression.

In the operation of the machine the wear upon the rolls is very severe,so that frequent adjustments of their positions are required. To makethese adjustments the nuts V on the ilQbOl'iS are turned back to permitthe rolls to be brought up together to compensate for the wear which hastaken place, after which the nuts T are turned up the same distance toshorten the tie-bolts. This is readily accomplished, for the reason thatthe heads 0 0 being prevented by the bolts P P from moving apart so asto relieve the tension of the springs B there will be no spring-pressureupon the nuts V or T, and hence they may be turned with comparativecase.

An adjustment of the tension of the springs It may be effected bytightening up the bolts P, one at a time, with the application. of muchless force than would be required to compress them simultaneously by theone large nut T.

by the construction devised by me and above described several importantresults are secured. It will be understood from the character of thework to be performed by the machine that the strain upon it is enormous,which strain ei'tects certain portions of the machine more than others;but by casting in one piece all those portions upon which the strainmainly fails I obviate the consequences of jarring and uneven strainingand greatly prolong the life of the machine as a whole. The entireframework of the machine, it will be observed, has this distinguishingfeature that the parts which bear the jars and strains incident to thecrushing of the ore are formed of a single piece of solid metal, whilethe remaining metal portions which are not so affected, but which go tocomplete the framework or basis for the superstructure or housing, arebolted to the solid portions. WVith respect also to the devices foradjusting the rolls, great advantages are gained by my im provements.The wring-cushions for the tiebelts in machines of this kind must becapable of withstanding a strain of perhaps twenty or thirty tons sothat to merely loosen a single nut against which such a pressure isexerted has heretofore required special tools and the application of agreater force than it is often practicable to obtain.

\Vhat I new claim as my invention is- 1. The combination, in anore-crusher of the kind described, with the solid casting formed withthe stationary pillow-blocks, the bearin s for the pivotedpillow-blocks, the side plates D, and the bed-plate, of the metalhousing 13, bolted to the solid casting, as herein set forth. 1

2. The con'ibination, in an ore-crusher of the kind described, with asolid casting formed with stationary pillow-blocks, bearings forswinging pillow-blocks, side plates, and a bedthe crushing-rolls andadjustable tie-bolts connectingthe movable supports of one roll to afixed portion of the machine, of a cushion for each of said tie-boltsfor receiving the strain upon the same, and composed of heads withintermediate spiral springs and bolts for securing the heads together,and provided with nuts whereby the distance between the heads and theconsequent tension of the springs may be varied by the independentadjustment of the nuts 011 the bolts, as set forth.

4. In an ore-crushing machine, the combination, with the rolls, onemounted in stationary and the other in pivoted or swingingpillow-blocks, and adjustable tie-bolts passing through the stationaryand connected to the pivoted pillow-blocks, of anindependentlyadjustable spring-cushion for each tie-bolt, and composedof the perforated heads 0 O, the connecting-bolts P, and spiral springssurrounding the bolts, as set forth.

STEPHEN R. KROM;

